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| bleaching powder | A mixture of varying proportions of complexes of chlorine with calcium oxide and calcium hydroxide. Contains 24-37% available chlorine. Decomposes in moist conditions to liberate chlorine. Strong irritant due to chlorine vapors. Used for disinfecting drinking water, sewage etc.; in the bleaching of wood pulp, linen, cotton, straw, oils, soaps, and laundry; as an oxidiser; in destroying caterpillars; and as a decontaminant for mustard gas and similar substances. Synonym: bleaching powder. (05 Mar 2000) |
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| goa powder | A bitter powder (also called araroba) found in the interspaces of the wood of a Brazilian tree (Andira araroba) and used as a medicine. It is the material from which chrysarobin is obtained. Origin: So called from Goa, on the Malabar coast, whither it was shipped from Portugal. Source: Websters Dictionary (01 Mar 1998) |
| powder | 1. The fine particles to which any dry substance is reduced by pounding, grinding, or triturating, or into which it falls by decay; dust. "Grind their bones to powder small." (Shak) 2. An explosive mixture used in gunnery, blasting, etc.; gunpowder. See Gunpowder. Atlas powder, Baking powder, etc. See Atlas, Baking, etc. Powder down, a boy formerly employed on war vessels to carry powder; a powder boy. Powder post. See Dry rot, under Dry. Powder puff. See Puff. Origin: OE. Poudre, pouldre, F. Poudre, OF. Also poldre, puldre, L. Pulvis, pulveris: cf. Pollen fine flour, mill dust, E. Pollen. Cf. Polverine, Pulverize. 1. To be reduced to powder; to become like powder; as, some salts powder easily. 2. To use powder on the hair or skin; as, she paints and powders. Source: Websters Dictionary (01 Mar 1998) |
| powder-posted | Affected with dry rot; reduced to dust by rot. See Dry rot, under Dry. (01 Mar 1998) |
| dover's powder | <alchemy> A powder of ipecac and opium, compounded, in the United States, with sugar of milk, but in England (as formerly in the United States) with sulphate of potash, and in France (as in Dr. Dover's original prescription) with nitrate and sulphate of potash and licorice. It is an anodyne diaphoretic. Origin: From Dr. Dover, an English physician. (04 Mar 1998) |
| james's powder | <medicine> Antimonial powder, first prepared by Dr. James, ar English physician. Synonym: fever powder. Source: Websters Dictionary (01 Mar 1998) |
| angostura bark | An aromatic bark used as a tonic, obtained from a South American of the rue family (Galipea cusparia, or officinalis). Origin: From Angostura, in Venezuela. Source: Websters Dictionary (01 Mar 1998) |
| bark | The outermost covering of trees and some plants. This is composed of the cuticle or epidermis, the outer bark (cortex), and the inner bark or fibre. (09 Oct 1997) |
| bark beetle | <zoology> A small beetle of many species (family Scolytidae), which in the larval state bores under or in the bark of trees, often doing great damage. Source: Websters Dictionary (01 Mar 1998) |
| bark louse | <zoology> An insect of the family Coccidae, which infests the bark of trees and vines. The wingless females assume the shape of scales. The bark louse of vine is Pulvinaria innumerabilis; that of the pear is Lecanium pyri. See Orange scale. Source: Websters Dictionary (01 Mar 1998) |
| bayberry bark | <botany> A widely dispersed genus of shrubs and trees, usually with aromatic foliage. It includes the bayberry or wax myrtle, the sweet gale, and the North American sweet fern, so called. Origin: L, fr. Gr. Tamarisk. Source: Websters Dictionary (01 Mar 1998) |
| maple bark disease | <radiology> Type of extrinsic allergic alveolitis, source: moldy maple bark in saw mills, organism: Cryptostroma corticale (12 Dec 1998) |
| cassia bark | Cinnamomum zeylanicum, an evergreen tree of the laurel family (lauraceae), and its dried inner bark used as a spice or medicinally. (12 Dec 1998) |
| Peruvian bark | A genus of rubiaceous south american trees that yields the toxic cinchona alkaloids from their bark; quinine, quinidine, chinconine, cinchonidine and others are used to treat malaria and cardiac arrhythmias. (12 Dec 1998) |
| cinchona bark | A genus of rubiaceous south american trees that yields the toxic cinchona alkaloids from their bark; quinine, quinidine, chinconine, cinchonidine and others are used to treat malaria and cardiac arrhythmias. (12 Dec 1998) |
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Phellodendron bark powder, Sodium Bicarbonate | ϹǾǰ | |
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